If the sun shines on me, what matters the moon? Pr.

If the sky fall, we shall catch larks. Pr.

If the time don't suit you, suit yourself to the 35 time. Turk. Pr.

If the tongue had not been formed for articulation, man would still be a beast in the forest. Emerson.

If the true did not possess an objective value, human curiosity would have died out centuries ago. Renan.

If the weather don't happen to be good for my work to-day, it's good for some other man's, and will come round to me to-morrow. Dickens.

If the world were put into one scale and my mother into the other, the world would kick the beam. Lord Langdale.

If the young knew, if the old could, there's 40 nothing but would be done. Pr.

If there be / A devil in man, there is an angel too. Tennyson.

If there be light, then there is darkness; if cold, heat; if height, depth; if solid, fluid; if hard, soft; if rough, smooth; if calm, tempest; if prosperity, adversity; if life, death. Pythagoras.