To fear love is to fear life, and those who fear life are already three parts dead. Bertrand Russell,
"To live is the rarest thing in the world. Most people exist, that's all." Oscar Wilde

"You must be the change you wish to see in the world."

"A real friend is someone who walks in when the rest of the world walks out."

"When one door closes, another opens; but we often look so long and so regretfully upon the closed
door that we do not see the one which has opened for us.
"The heart has reasons that reason does not understand."

"If you are going through hell, keep going." Winston Churchill

"Our greatest glory is not in never falling, but in rising every time we fall." Conficius

"The difference between genius and stupidity is that genius has its limits." Albert Einstein

"Live as if you were to die tomorrow; learn as if you were to live forever.

"Life is what happens to you when you are busy making other plans." John Lennon

 

First things first, but not necessarily in that order.
There's no point in being grown up if you can't be childish sometimes.
Doctor Who