For each of us there is a set limit to our intellectual powers which we cannot pass.

By 'God', I understand, a substance which is infinite, independent, supremely intelligent, supremely powerful, and which created both myself and everything else [...] that exists. All these attributes are such that, the more carefully I concentrate on them, the less possible it seems that they could have originated from me alone. So, from what has been said it must be concluded that God necessarily exists.

The principal effect of the passions is that they incite and persuade the mind to will the events for which they prepared the body.

For to be possessed of a vigorous mind is not enough; the prime requisite is rightly to apply it.

Desire awakens only to things that are thought possible.

You just keep pushing. You just keep pushing. I made every mistake that could be made. But I just kept pushing.

There is nothing so far removed from us as to be beyond our reach, or so hidden that we cannot discover it.