not for nothing
Meaning
For an extremely good reason.
Used to soften the impact of what is said next, implying that it is important.
Used other than figuratively or idiomatically: see not, for, nothing.
Source: en.wiktionary.orgRelated terms
Examples
It is not for nothing that Skaldin in one part of his book quotes Adam Smith: we have seen that both his views and the character of his arguments in many respects repeat the theses of that great ideologist of the progressive bourgeoisie.
I grieve for you, how I mourn for you, who are so very dear to me, but again I can rejoice within my heart, not for nothing "have I labored," neither has my exile been "in vain."
T is not for nothing that we life pursue; It pays our hopes with something still that's new.
Not for nothing did Eldridge Cleaver say that the North Korean police made him miss the Oakland police.
[R]ace theory is at variance with all Korean traditions; not for nothing did the national language lack a word for race until modern times.
It is not for nothing that the devil lays himself down in the ditch.