The only objects of practical reason are therefore those of good and evil. For by the former is meant an object necessarily desired according to a principle of reason; by the latter one necessarily shunned, also according to a principle of reason.

The existence of the Bible is the greatest blessing which humanity ever experienced.

It is never too late to become reasonable and wise.

Men will not understand ... that when they fulfil their duties to men, they fulfil thereby God's commandments; that they are consequently always in the service of God, as long as their actions are moral, and that it is absolutely impossible to serve God otherwise.

I assert that, in any particular natural science, one encounters genuine scientific substance only to the extent that mathematics is present.

There can be no doubt that all our knowledge begins with experience.

Procrastination is hardly more evil than grasping impatience.