Progress begins with the minority. G. W. Curtis.
Progress is the law of life—man is not man as 55 yet. Browning.
Progress, man's distinctive mark alone, / Not God's and not the beasts': God is, they are; / Man partly is, and wholly hopes to be. Browning.
Progress—the stride of God. Victor Hugo.
Prohibetur ne quis faciat in suo, quod nocere potest in alieno—No one is allowed to do on his own premises what may injure those of a neighbour. L.
Prolonged endurance tames the bold. Byron.
Promettre c'est donner, espérer c'est jouir—Promising 60 is giving, and hoping is fruition. Delille.
Promise is most given when the least is said. Chapman.
Promises make debts, and debts make promises. Dut. Pr.
Promises may get friends, but it is performance that must nurse and keep them. Owen Feltham.