An humble soul knows that little sins, if I may so call any, cost Christ his blood, and that they make way for greater; and that little sins multiplied become great, as a little sum multiplied is great; that they cloud the face of God, wound conscience, grieve the Spirit, rejoice Satan, and make work for repentance, &c. An humble soul knows that little sins, suppose them so, are very dangerous; a little leaven leaveneth the whole lump, a little staff may kill one; a little poison may poison one, a little leak in a ship sinks it; a little fly in the box of ointment spoils it; a little flaw in a good cause mars it; so a little sin may at once bar the door of heaven and open the gates of hell; and therefore an humble soul smites and strikes itself for the least as well as the greatest.
Thomas Brooks (Puritan)