Thoughts

Words by themselves give rise to feelings, but combined into sentences by logic they represent what we call a thought.

In essence a thought is nothing but a series of feelings. Thoughts are feelings with logic.
Rationality is logic in feelings. We use logic in order to make our (pleasant) feelings in their integrated form as large as possible.

Thus for a deeper understanding of ourselves and the universe we can forget about thoughts and concentrate on feelings, like physicists can forget about molecules and concentrate on atoms (or even subatomic particles) when they are searching for a deeper understanding of matter.