Human nature has its fatal weaknesses, but 'love' means embracing the whole of human nature, the bad within the good, the benign within the malicious, the beautiful within the tragic. 'Love' is the experience of this whole, its unfinished parts, including those of one's own in relation to those of the other.
A race of altruists is necessarily a race of slaves. A race of free men is necessarily a race of egoists.