Speaking to a friend at 3 in the morning... I don't make that good a communicator or teacher ^_^

Anyways, this is how it went:

Is it to your belief, that you can know any person "Perfectly"?
<<Well, but not perfectly>>
And why is it that you can not know a person "Perfectly"?
<<Because you never know what's happening in a person's mind.>>
What indicates to you what's going on through that person's mind?

...

typing, talking, facial expressions, tone, gestures...

All these things allow you passage to a person's mind.

...How are all these things Related to the person's mind?

They are all Created.

Every single movement they have, dream they experience, ...Every single thing that that mind creates, gives us hints as to how that mind works. The trick is to realise how, and why.

Whether it's fiction, RP, direct conversation, or a letter... Every word you read from another online... should be conceived as an image, created by that person. If it's a depressed image, then often that person is depressed. Happy story, that person tends to be happy. etc. Online you don't have the previledge of real sight or smell or tone or voice or eyes or aura...

...However, you never, Ever take a product of one's mind, to be the true thoughts in one's mind. Even written words, and chatting online, because as close as they come, they are still not complete.They are a selection of many, many images (words) in a compilation

Feelings can be represented, or about as close as it possibly can be, through a wide array of images...

Many beings online will post and write only what they wish others to hear. Yet, what they write, is still purely a fabrication, derived from their mind. Recognizing the patterns in their writing gives us moods, mindsets, etc. You know this much.

By toying with that front, you often see what's causing it...

They can, by pure curiosity, take on a lying or depressed persona, Just to see how others React... These personas have one thing that makes them easy to detect; They're "Perfect". Or rather, attempts at a flawless mind. By toying with that front, and reaching out to the mind behind, you often see what's causing it...

...a disability, for example, can vary in depth... ...you can conciusly conjure a disability... very, very, simply, if you know the right array of images to show, to represent it. Words, tone, action, etc... ...but as such, it's often very easy for one to guess it; it's a concious creation, and no matter how well you can back it up, another concious mind has the ability to take it down.

Learn the art well, and you can make a difference in that person's life, by predicting, learning, analysing, and flat out following your gut.