Seneca and Zeno

Now we are not merely to stick knowledge on to the soul: we must incorporate it into her; the soul should not be sprinkled with knowledge but steeped in it. (Seneca)

http://www.spaceandmotion.com/Philosophy-Seneca.htm

Zeno - Stoicism - 4th century BC

God is not separate from the world; He is the soul of the world, and each of us contains a part of the Divine Fire. All things are parts of one single system, which is called Nature; the individual life is good when it is in harmony with Nature. In one sense, every life is in harmony with Nature, since it is such as Nature’s laws have caused it to be; but in another sense a human life is only in harmony with Nature when the individual will is directed to ends which are among those of Nature. Virtue consists in a will which is in agreement with Nature. The wicked, though perforce they obey God’s law, do so involuntarily; in the simile of Cleanthes, they are like a dog tied to a cart, and compelled to go wherever it goes.
In the life of an individual man, virtue is the sole good; such things as health, happiness, possessions, are of no account. Since virtue resides in the will, everything really good or bad in a man’s life depends only upon himself. He may be poor, but what of it? He can still be virtuous. He may be sentenced to death, but he can die nobly, like Socrates. Other men have power only over externals; virtue, which alone is truly good, rests entirely with the individual. Therefore every man has perfect freedom, provided he emancipates himself from mundane desires. (Zeno)