We find that from his letters.

But he owed money not as a needy man does, but as one who is speculative, sanguine, and quite confident of his own resources.

The management of incomes was not so fixed a thing then as it is with us now.

Speculation was even more rampant, and rising men were willing and were able to become indebted for enormous sums, having no security to offer but the promise of their future career.

Caesar's debts during various times of his life were proverbial.