BRUTUS: There is a tide in the affairs of men
Which, taken at the flood, leads on to fortune;
Omitted, all the voyage of their life
Is bound in shallows and in miseries.
On such a full sea are we now afloat,
And we must take the current when it serves
Or lose our ventures.

William Shakespeare (1564–1616) English dramatist and poet

Julius Caesar, Act 4, sc. 3, l. 249ff (4.3.249-255) (1599)
    (Source)