You must be strong, you must not feel sad. Otherwise they will say you are weak, you are a coward, you are miserable. They won´t say "this happened to her because she loved".

Biliyorum,
ölümün âdil olması için
hayatın âdil olması lâzım, diyorsunuz...

Bir eski Acem şairi...
Dostlar beni bırakıp,
dostlar, böyle hışımla
                            nereye gidiyorsunuz?

(Nazım Hikmet, Ölüme dair)

I know,

so that death could be fair

you are saying: life should be fair.

An old Acem poet...

-  Friends, where are you going

and leaving me

so angry?

To put it in short, the subject of the embedded sentence takes the genitive form except in the cases where the embedded sentence functions as an adverbial (of time) in the main clause.

DIK is a subordinating suffix. When you want to embed a sentence into another sentence  -  for instance when translating English subclauses to Turkish  -  you usually use the DIK form of a verb.

You are right, it has no tense of its own and it agrees with the tense of the main clause predicate. It does not take personal endings but possessive suffixes to denote its subject.

DIK participle is not only a noun. Sometimes it is more like an adjective. And it has traces of its verbal origin also (for instance, it can take an object).

Not only. ABİL can also denote permission

                            Kredi kartıyla ödebilir miyim?

or possibility (truth value of the proposition):

                            3D yazıcılar yakında her evde olabilir.

I think it is possible to use ABİL in polite requests:

                            Bana menü getirebilir misiniz?

But also the aorist tense is widely used:

                            Biraz bekler misin?

For more detailed information, wait for natives.

My Try.

Interesting.

As ola is the old future form and often in contemporary language conveys a wish, I am curious to know whether the ECEK future can do the same job, like

                          ?görmez olacaktım

or do you need to add the SA signal of wish like in

                           ?görmez olsaydım    ?

dediğim gibi is correct because dediğim is a participle > noun/adjective and dedim is a finite verb.

You are worth them and you are worth even more.

(My Try.)

Man does not know the time when he is fated to die.

He does not know his destiny either.

There is only one thing known: love.

Nevertheless, its value is not known either.