To make haste slowly

Diligent, and intelligent. Diligence quickly accomplishes what the intelligence has well thought out. Haste is the passion of fools, and as they know not the difficulties, they work without heed: wiser men, on the other hand, are likely to fail from over-caution; for of reflection is bred delay: and so their hesitation in acting loses them the fruits of their good judgment. Promptitude is the mother of fortune. He does much who leaves nothing for tomorrow. A magnificent motto: to make haste slowly.

Gracian’s Manual, § 53