...

Life of humans...

In a way, Humans are much like the water molecules racing along in a stream.
No single molecule is of the least significance - it would not matter a jot if it had never existed!

Each molecule is aware of itself only by virtue of the 'neighbours' buffeting it.

But, that molecule which happens to splash out onto the bank, realises itself in a different way.

Whilst still knowing that it is insignificant in worldly terms it can now see what is going on and being a thinker it takes pleasure from the search for knowledge, detection and appreciation of reality, and realisation that if it can just cause a big enough mud-slide it can change the lives of all the other molecules!
Maybe better - maybe worse!

I know it's far-fetched, but it is how I view and can apportion value to each of our lives.
Everyone can contribute, but remember that it is far easier to obstruct or destruct than it is to construct.

How about instruct?

There's my contribution from atop the bank.

To instruct can be either constructive or destructive, depending on the effects of the instructions given as produced by the receiver of the information.
eg. how to make a bomb versus how to avoid being run down by cars.

....or how to relate human to human, with understanding and cognizant recognition?

By speaking the language of universal truths?

"When you know, say you know; when you don't know say you don't know. This is the secrest of knowledge," Confucius.

2:11 He who by revising the old knows the new, is fit to be teacher.

2:13 The true gentleman preaches only what he practices.

2:14 The gentleman considers the whole rather than the parts.

4:11 A gentleman seeks virtue, a small man seeks land. A gentleman seeks justice, a small man seeks favours.

2:15 To study without thinking is futile. To think without studying is dangerous.

4:24 A gentleman should be slow to speak and prompt to act.

13:26 A gentleman shows authority, but no arrogance. A vulgar man shows arrogance, but no authority.

The "Analects" are an affirmation of humanist ethics and of the universal brotherhood of man.