Nor can any one doubt of this, unless it happens to us who think with care and anxiety about the soul (as is often the case with those who look earnestly at the setting sun), to lose the sight of it entirely; and so the mind's eye, viewing itself, sometimes grows dull, and for that reason we become remiss in our contemplation.

Thus our reasoning is borne about, harassed with doubts and anxieties, not knowing how to proceed, but measuring back again those dangerous tracts which it has passed, like a boat tossed about on the boundless ocean.
But these reflections are of long standing, and borrowed from the Greeks.

But Cato left this world in such a manner as if he were delighted that he had found an opportunity of dying; for that God who presides in us forbids our departure hence without his leave.

But when God himself has given us a just cause, as formerly he did to Socrates, and lately to Cato, and often to many others--in such a case, certainly every man of sense would gladly exchange this darkness for that light: not that he would forcibly break from the chains that held him, for that would be against the law; but, like a man released from prison by a magistrate or some lawful authority, so he too would walk away, being released and discharged by God.

For the whole life of a philosopher is, as the same philosopher says, a meditation on death.
XXXI.