I use logic and emotion to check how my thought process jibes with my values, and also how they fit together. Feelings/Values/Logic are the three components of desicion making (I am referring to decisions about human based problems, not simple logical problems). The best decision is emotionally satisfying, reasonable and supports my values. They will never be in perfect balance, but that imbalance is a signal to go back and reassess.
I think that feelers may short-change the logical part of the process in deference to support of values and emotion, thinkers leave out emotions. These omissions can be obvious to the intelligent observer, because it will seem that something has been omitted, or that something else has entered into the equation; hence the frequent sense that there is another motivation involved that is beyond those three parameters.