Simply and in English... it`s like fixed phrases in English, so:

'znać' sth (like 'know sth') znać Angielski (know English), znać ludzi (know people), znać Marka (know Mark)

'wiedzieć' about sth ('know about sth') wiedzieć o spotkaniu (know about the meeting), wiedzieć więcej (know more)

'imponderabilia' jest moim ulubionym słowem :D (=it`s my favourite word :D) oznacza rzeczy niewidoczne, ulotne, ale bardzo ważne w życiu (=it means things that are invisible, elusive, but very important in life). 

Hope that helps!

Trzymaj się! (=take care)

red - corrected

green - optional

navy blue - added

Fear / happiness

Humans have always been in constant search of Happiness. There are many ways to study this topic but fear is definitely for me the (most) crucial cause of unhappiness for me.
I consider that it is practically impossible to be happy (or I consider being happy practically impossible) in this society because the nature of our social system that is has been created to inject fear and the other mechanisms in place to do this and they are enormous and increasingly diverse and efficient.

They sell us fear from the most hidden devices. From Due to advertising we buy (useless) stupid  products because without them we are taught told that we are in DANGER without them. 

Fear of not being attractive; having much leg hair, teeth not enough white, being overweight, hair loss, cellulite, body odor, outmoded clothes ... Fear of illness and death; germs invading your home, food and body if you do not buy the right product. Fear of having cholesterol if you do not buy yogurt or proper drinks, fear of not having the vitamins that we need, fear of having wrinkles, Alzheimer ...
Fear of not being cool if you don´t perform certain activities, vacations, clothing, use of leisure time, fear of not being informed, fear of losing your job failure if you're not properly prepared ...
Fear of not being protected: from being robbed or mugged, epidemics, new world war, until you are not even safe after your death if you didn´t choose (haven`t chosen sounds better here, I reckon) the saving religion.

Happiness is the absence of fear. Fight it and you'll be closer to your own happiness, but beware of with your "fear to be afraid" because that also falls under this absurd game. After all Finally, the shit they put into our heads we are taught to makes us blame ourselves. "If you're not happy, it is your problem, you are the culprit; go and fill (up) your library of with self-help books or try reading Paulo Coelho (instead)".

Hopefully, the saying is true that older people become like children in old age is true, because maybe there is hope for the happiness that they have stolen us when we were a child children.

My Summer vacation

On (1) At the beginning of the summer I was at home. I watched TV, listened to music and helped my parents. I went to concerts. I had a lot of free time. In August I traveled on to the a camp. I was in Berdyansk. I swam in the Azovian Sea, lay in the sun, took photographes. Every evening I went dancing. (2) In the night I with my friends went to the seaboard. We watched sunrise, went for a walk in Berdyansk. We sat by the fire and sang songs. It was very cool.

1. In the beginning.... but at the beginning OF

2. At night = in the night