You naturally see them one way, but if you focus enough you can realize the other way of viewing it -- the way that others see it naturally -- and can begin to see it that way yourself.
Similarly, I've noticed, if I'm sitting somewhere peacefully, let's say in nature, I naturally see things via my Ni. I'll be looking at the view but not really seeing it -- instead seeing metaphors, symbols, deeper life lessons or realizations. But if I focus intently enough (yeah, you know where this is going you Ni ;p) I can realize how to view the scene via my Se: completely bereft of thought, in the moment -- noticing everything, every detail, every color -- feeling every sensation in my body, the wind blowing, the sounds, etc.
We all know this is possible.
My question is, (and this goes against the grain), if we learn how to realize or see through the eyes of another function (via our Ni), isn't it possible to learn to use even our shadow functions on demand? Our core conscious functions will always be home base, but I think the ability to use others is very possible.
For example, I think I realize, understand, know how, and actually have used Te upon demand many times in my life. Naturally I analyze and break things down via my Ti but with enough focus I've realized I'm able to set aside the details and the curiosity -- and learn to see the world as a series of objective facts which can be rearranged and synthesized to achieve measurable results. Upon solving math problems -- I've practiced using Te instead of Ti in the way that I approach the problems; instead of understanding math vaguely and running with the torch -- skipping steps yet somehow finding my way to the answer (via subconscious images -- Ti), I've learned to learn all the rules for nothing more than what they are, think in a step by step prioritized manner, and dish out answers via good well-practiced form, compromising a deeper level of understanding and curiosity.
Similarly, I've noticed I can view the world with Ne and Si with enough focus.
Do you think it's possible to realize and use other functions via Ni?