Life is...............wonderful?

It takes a night to make it done
And it takes a day to make you young brother
And it takes some old to make you young
It takes some cold to know the sun

It takes the one to have the other
And it takes no time to fall in love
But it takes you years to know what love is
And it takes some fears to make you trust
It takes those tears to make it rust
It takes the dust to have it polished