Can someone please translate for me !!

Here are my suggested translations:

"No heart has ever suffered when it goes in search of its dreams."

Nullum cor sua somnia quaerens umquam doluit.
Nullum --> No
cor --> heart
sua --> its
somnia --> dreams
quaerens --> seeking, in search of
umquam --> ever
doluit --> has suffered

"Let your soul stand cool and composed before a million universes."

Anima tua coram decies centenis milibus universis lenta atque tranquilla stet.

Anima --> soul
tua --> your
coram --> before
decies --> ten times
centenis --> a hundred
milibus --> thousand
universis --> universes
lenta --> cool
atque --> and
tranquilla --> composed
stet --> let stand

Please read this.