What did Baruch Spinoza believe about the meaning of life?

Answer 1

For Spinoza, asking about the "meaning of life" would be like asking about the meaning of God, because God and Nature are One, and the unfolding of natural reality just is the eternal process of God being God. And since Spinoza was also a determinist, the ultimate goal/perfection of All is predetermined – it is eternal and in some sense it already exists, so reality is like a reel of movie film; all the of the frames already exist in God' nature (that's my own metaphor, not Spinoza's – they didn't have movies back then ;-)

Answer 2

I assume the big point:

There is no real difference between good and evil.