I didn't know until I websearched just now that this is a poem by Kahlil Gibran. I know it as a song by Sweet Honey In The Rock and also as covered by The Flirtations.
[the part with a melody]
Your children are not your children
They are the sons and the daughters of life's longing for itself.
They come through you, but they are not from you
And though they are with you, they belong not to you.
You can give them your love but not your thoughts
No, they have their own thoughts.
You can house their bodies but not their souls
For their souls live in the house of tomorrow
Which you cannot visit, not even in your dreams.
You can strive to be like them,
But seek not to make them just like you.
[the rest of Gibran's original]
For life goes not backward nor tarries with yesterday.
You are the bows from which your children
As living arrows are sent forth.
The Archer sees the mark upon the path of the infinite,
And He bends you with His might
that His arrows may go swift and far.
Let your bending in the Archer's hand be for gladness:
For even as he loves the arrow that flies,
So He also loves the bow that remains.