Insight on Love

Brown Penny

I whispered, 'I am too young,'
And then, 'I am old enough';
Wherefore I threw a penny
To find out if I might love.
'Go and love, go and love, young man,
If the lady be young and fair.'
Ah, penny, brown penny, brown penny,
I am looped in the loops of her hair.

O love is the crooked thing,
There is nobody wise enough
To find out all that is in it,
For he would be thinking of love
Till the stars had run away
And the shadows eaten the moon.
Ah, penny, brown penny, brown penny,
One cannot begin it too soon.

-W. B. Yeats

I really liked this poem the first time I heard it. Reading it again, I find great artistry at work.
The use of contradicting words and whole verses just make clear one thing:
love is in fact a dilemma and you can never be sure about whether to indulge or not.
It's more chance (like flipping a brown penny) than plan and the open end to this poem says it all, "One cannot begin it too soon."