life is full of .... anything harder than I thought ... is ain't easy!

Life is full of learn...
to be scared, rather to be rat...
"You can't connect the dots looking forward,"... "You can only connect them looking backwards."
this the way I recognize myself, my way, including my life...
but, times make me sad more than happy...
y?
life is full of suffering than I thought...
anyone can tell me?