Because your question searches for deep meaning, I shall explain in simple words

The human race finds itself in a better situation when it has the higher level of freedom.

Consider your origins: you were not made to live as brutes, but to follow virtue and knowledge.

The secret of getting things done is to act!

I care not where my body may take me as long as my soul is embarked on a meaningful journey.

To get back up to the shining world from there My guide and I went into that hidden tunnel, And Following its path, we took no care To rest, but climbed: he first, then I-so far, through a round aperture I saw appear Some of the beautiful things that Heaven bears, Where we came forth, and once more saw the stars.

O you, who in some pretty boat, Eager to listen, have been following Behind my ship, that singing sails along Turn back to look again upon your own shores; Tempt not the deep, lest unawares, In losing me, you yourselves might be lost. The sea I sail has never yet been passed; Minerva breathes, and pilots me Apollo, And Muses nine point out to me the Bears. You other few who have neck uplifted Betimes to the bread of angels upon Which one lives and does not grow sated, Well may you launch your vessel Upon the deep sea.