What's an intelligent/sophisticated way to say "changing from negative to positive"

i am currently working on a new website for posting daily articles and guides on gaining full control of your mentality.

What i am inquiring for, is a sophisticated but brief way of saying "to change from something from negative to positive.

example: to change negative thoughts to a positive perspective to be pessimistic minded but to make progression towards becoming optimistic

Thank you.

Solution 1:

Reversal of Polarity

See the Merriam-Webb entry for polarity. This would seem an objective description. Or, perhaps if you must include “positive”

Restoration of Positive Polarity