Charles H. Spurgeon on Psalms 130:4

But. How significant is that word "but" As if you heard justice clamouring, "Let the sinner die", and the fiends in hell howling, "Cast him down into the fires", and conscience shrieking, : "Let him perish", and nature itself groaning beneath his weight, the earth weary with carrying him, and the sun tired with shining upon the traitor, the very air sick with finding breath for one who only spends it in disobedience to God. The man is about to be destroyed, to be swallowed up quick, when suddenly there comes this thrice blessed "but", which stops the reckless course of ruin, puts forth its strong arm bearing a golden shield between the sinner and destruction, and pronounces these words, "But there is forgiveness with God, that he may be feared." —C. H. S.