I'm ENTJ, and I frequently think about the strength.
Will ENTJ lose their strength when they care much about people?
Will ENTJ lose their strength when they care much about the feeling, the emotion of others?
Will ENTJ lose their strength when they show their heart and the love from it?

And this is what I got - No

Why do I said that?

Because the innate strength of ENTJ is thinking logically, decisive, assertive. And when we care more about the emotion, the deeper inside us tell us "be stronger, and stronger", and you know, at the time, we have to be stronger, both the brain and the heart. I find that after the time we improve our heart, our brain is much more improved. I don't know exactly why. But I realize that, in the position of a leader, that is very great!

Hope that I can receive more of your ideas, friends!