“I shall not die, but live, and declare the works of the Lord.” – Psalm 118:17

How very differently we view things at different times and in differing states of mind! Faith takes a bright and cheerful view of matters, and speaks very confidently, “I shall not die, but live.” When we are slack as to our trust in God, and give way to misgivings and doubts and fears, we sing in the minor key, and say, “I shall die. I shall never live through this trouble. I shall one day fall by the hand of the enemy; and that day is hastening on. Hope is failing me. Bad times are at the door. I shall not live through this crisis.” Thus our tongues show the condition of our inner man. We talk according to our frames and feelings, and would make others think that things are as we see them with our jaundiced eyes. Is it not a pity that we give a tongue to our unbelief? Would it not be better to be dumb when we are doubtful? Muzzle that dog of unbelief! Dog did I call him? He is a wolf; or should I call him hound of hell? His voice is as that of Apollyon: it is full of blasphemy against God. Unbelieving utterances will do no good to yourself, and will do harm to those who listen to your babblings. It would be wise to say, “If I should speak thus, I should offend against the generation of Thy children. When I thought to know this, it was too painful for me.” Let us be dumb with silence when we cannot speak to the Glory of God. But, oh, it is a blessed thing, when faith is in our spirit reigning and powerful, to let it have ample opportunity to proclaim the honours of His name! To give his heart a tongue, is wise in man when his heart itself is wise. The more talk we get from the mouth of faith, the better: her lips drop sweet-smelling myrrh. A silent faith, if there be such a thing, robs others of benedictions; and at the same time it does worse, for it robs God of His glory. When we have a joyous faith in full operation, let us be communicative, and let us openly and boldly say, “I shall not die, but live, and declare the works of the Lord.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2237.cfm