Hebrews 10:23

Let us hold fast the profession of our faith without
wavering
Either in the grace or doctrine of faith, or in the profession of both; (See Gill on Hebrews 4:14).

For he [is] faithful that promised;
that is God; and it is true of Father, Son, and Spirit; but God the Father may be more especially designed: he is a promising God, and is known to be so by his people; he is eminently and emphatically the Promiser; and all other promisers, and the promises made by them, signify little; but the promises of God are exceeding great and precious, very ancient, free, and unconditional, irrevocable and immutable, and are admirably suited to the cases of his people, and will be fulfilled everyone of them: they include in them things temporal, spiritual, and eternal; things temporal, as that his people shall not want, that their afflictions shall work for good, and that he will support them under all their troubles; things spiritual, as that he will be their God, which takes in his everlasting love to them, and his gracious presence with them, and his protection of them; and that all grace shall be wrought in them, and every blessing of grace bestowed on them: and things eternal; as everlasting glory and happiness; the promise of eternal life was in God's heart, made in the covenant, and put into Christ's hands before the world began, and is declared in the Gospel: now God is faithful to all his promises, nor can he fail, or deceive; he is all wise and foreknowing of everything that comes to pass; he never changes his mind, nor forgets his word; and he is able to perform, and is the God of truth, and cannot lie; nor has he ever failed in anyone of his promises, nor will he suffer his faithfulness to fail; and this is a strong argument to hold fast a profession of faith.