Positive or constructive?

We often hear “think positively” and the like, but somehow, I am taking a more semantic approach and wondering if the term “constructive” isn't preferable to “positive”, in the context of these little things we do and think on a daily basis and that create the textures of our lives.

“Positive” is both too general and theoretical, whereas “constructive” hold in itself the practicality and the grounding that should mark whatever passes through our most desirable attitudes and thoughts...