"Ways" and "paths" describe the two kinds of roads, the "highway" and the "byway." In both these he who was guided by Wisdom would walk securely.

Her ways are ways of pleasantness - These blessings of true religion require little comment. They are well expressed by the poet in the following elegant verses: -
"Wisdom Divine! Who tells the price
Of Wisdom's costly merchandise?
Wisdom to silver we prefer,
And gold is dross compared to her.
Her hands are fill'd with length of days,
True riches, and immortal praise;
Riches of Christ, on all bestow'd,
And honor that descends from God.
To purest joys she all invites,
Chaste, holy, spiritual delights;
Her ways are ways of pleasantness,
And all her flowery paths are peace.
Happy the man that finds the grace,
The blessing of God's chosen race;
The wisdom coming from above,
The faith that sweetly works by love!"
Wesley.

Her ways are ways of pleasantness,.... The "ways" and methods which Christ took to bring about the salvation of his people; some in eternity, as engaging as a surety for them, entering into a covenant with his father on their account, taking the care and charge of their persons, grace, and glory; others in time, as the assumption of their nature, obedience to the law, suffering and dying in their room and stead, rising again, ascending to heaven, and interceding for them; calling them by his grace, clothing them with his righteousness, and keeping them by his power unto salvation, and at last introducing them into his kingdom and glory. These are "pleasant", to view the love of Christ in them, the success that attended them, the glory of God brought about hereby, and the salvation of his people; which is exceedingly pleasant, being agreeable to all the perfections of God; suitable to the case of sinners, full and complete in itself, free to them, and of an everlasting duration; it is this which makes Christ so pleasant to souls, and the Gospel also: or else the ways which Christ has prescribed and directed his followers to walk in are here meant; as himself, who is the principal way, and the only way to the Father, and to heaven and happiness; also the ways of faith, holiness, and truth, the ways of Christ's commandments, and all the ordinances of the Gospel and institutions of religion; which are "pleasant", when the presence of God and Christ is enjoyed in them; when the heart is enlarged with the love of God and Christ; when assisted therein by the Spirit of God, having good food and refreshment in them, and good company with them; and which, though attended with much tribulation, end in eternal pleasure;
and all her paths are peace; the "paths" which Christ has trod in to procure the peace of his people; he appeared in the council of peace, and assisted in it; he entered into a covenant of peace with his Father; he assumed the nature of his people, in order to be their peacemaker; he took the chastisement of their peace upon him; he obtained it by the blood of his cross; he sends his ministers to publish it, and his Spirit into the hearts of men to reconcile them to this way of peace and salvation by him; and the result of all this is, that an honourable "peace" is made for sinners, and peace of conscience is enjoyed, which passeth all understanding, flowing from the blood, righteousness, and sacrifice of Christ; and the whole issues in eternal peace in the world to come. Likewise all those "paths" which Christ instructs his people to walk in; as the paths of faith and obedience, these lead to the enjoyment of "peace" here and hereafter; there is much peace had in a way of believing, and great peace have they which love the law of God, and the commandments of Christ, and obey them; they may meet with much uneasiness at times in their own spirits, by reason of sin, temptation, and desertion; they may bring the malice of the world upon them, and have much trouble from it, and too, too often, disagree among themselves; and yet, after all, they have that peace which others have not while they live; and, when they die, they depart in peace, and enter into eternal peace. Now all this is true, not of unregenerate persons, who desire not the knowledge of Christ, and to whom there is no peace, but of true believers in him.

Her ways--such as she directs us to take.

דּרכי־נעם are ways on which one obtains what is agreeable to the inner and the outer man, and which it does good to enjoy. The parallel שׁלום is not a genitive to נתיבות to be supplied; that paths of Wisdom are themselves שׁלום, for she brings well-being on all sides and deep inwards satisfaction (peace). In regard to נתיבה, via eminens, elata, Schultens is right (vid., under Proverbs 1:15);
(Note: The root is not תב, to grope, but נת; whence Arab. natt, to bubble up, natâ, to raise oneself, to swell up, etc.)
נתיבותיה has Munach, and instead of the Metheg, Tarcha, vid., under Proverbs 1:31. The figure of the tree of life the fruit of which brings immortality, is, as Proverbs 11:30; Proverbs 15:4 (cf. Proverbs 13:12), Revelation 2:7, taken from the history of paradise in the Book of Genesis. The old ecclesiastical saying, Lignum vitae crux Christi, accommodates itself in a certain measure, through Matthew 11:19; Luke 11:49, with this passage of the Book of Proverbs. החזיק ב means to fasten upon anything, more fully expressed in Genesis 21:18, to bind the hand firm with anything, to seize it firmly. They who give themselves to Wisdom, come to experience that she is a tree of life whose fruit contains and communicates strength of life, and whoever always keeps fast hold of Wisdom is blessed, i.e., to be pronounced happy (Psalm 41:3, vid., under Psalm 137:8). The predicate מאשּׁר, blessed, refers to each one of the תּמכיה, those who hold her, cf. Proverbs 27:16; Numbers 24:9. It is the so-called distributive singular of the predicate, which is freely used particularly in those cases where the plur. of the subject is a participle (vid., under Proverbs 3:35).

Peace - Procure a blessed tranquility in a man's mind and conscience.