Let us hold fast the profession of our faith without wavering; (for he is faithful that promised). Heb. 10:23
Brother and sister, let us hold fast the profession of our faith without wavering, meaning, let us continue confident in the God who saves us through his Son Jesus Christ, who is the perfect high priest offering the perfect sacrifice to obtain the perfect redemption. Let us hold fast to all the promises of the New Covenant in Christ, that God will be our God, that we will truly know him, that he will write his law in our hearts, and forgive all our sins.
Hold fast. Hold fast against all the discouragements of this life that come in the normal course of things but which begin to wear us down. Hold fast against the temptations that come with ease and success and whisper in our ears that we don't need God and his salvation after all. Hold fast against the tragedies that come as a blow to the face and a knife in the heart and which make us wonder about God's love and goodness. Hold fast against persecution, against the despisers and those who want to cancel you for the stand that you take for Christ.
Why? For the God who promises will keep all his promises. He is faithful. He cannot lie and he is not constrained by any limitation that would render him unable to follow through. "He is too wise to err and too good to be unkind." And since he has already given us his Son, how shall he not with him also freely give us all things? (Rom. 8:32). My friend, at the end of the day, don't make God a liar by what is inevitably a false interpretation of God's providence. He has been clear as to his intentions in his promises and we can take these to the bank. As William Cowper put it:
Blind unbelief is sure to err
And scan His work in vain.
God is his own interpreter
And He will make it plain.