“And do not evaluate, measure, or judge your periods of contemplative prayer. In our achievement-oriented society, we’ll probably begin to pray with a superficial concern for results in a futile attempt to discern if our investment of time and energy was worth it. Did it produce any luminous insight or any extraordinary experience? That kind of spiritual materialism will disappear, the ego will be purified, and self-consciousness will fade through the practice of daily prayer.
There is this continuum between thoughtfulness and impulsivity (or not thinking) on which people naturally land. And, as with most continuums, being able to strike a balance is good. I believe it is good to have a little of both thoughtfulness and thoughtlessness in your life. You should be able to step back and have some constructive thought about where your life is going and “what it all means,” for instance, but too much of that becomes narcissism and/or neuroticism. This is often what anxiety and depression are made of.