Always remember this rule. What is the image above trying to say?

Hint 1:

There is some good ol' slicing; there is some good ol' concatenation; there is some good ol' symbol-to-English. Save the $$\pm L_\alpha$$ symbol for last; it is the most obscure.

Hint 2:

Focus on manipulating actual letters to construct the whole, left to right. For example, a map of Spain "minus" a picture of a father could be "Sin".

Hint 3:

"Equals to" in plain English must be what? And do zeroes perhaps have look-alikes?

• Those numbers with colons looked like biblical citations to me, but I guess there are no zeroth chapters ... Commented Apr 2, 2020 at 14:27
• Perhaps this will help with interpreting the colons Commented Apr 2, 2020 at 14:51

With anodyne's comments on my previous answer, and Lanny Strack's push in the right direction (technically he got the answer first so if he posts I would suggest accepting his), I got:

The Onleeway (S)out(H) is throo => The only way out is through.

Reasoning:

With anodyne's comment about slicing, I think 1[0:1] -> On (first two letters of one) and 3[0:2] -> Thr (first three letters of Three). With the second hint, I think the compass and picture yields 'out' (south - sh). The third hint gives me = -> 'is' and "0" to "O" (colloquial way to say zero out loud).

We can get the tricky symbol to be

leeway

Which ties it all together.