The Beinoni differs in his approach to his service of Hashem in that he does not want to be separated from God for even one moment. Whereas all Jews have within them the power to sanctify God’s Name through self-sacrifice, this does not deter them from committing other sins – God forbid.
But the Beinoni does not succumb to the spirit of folly that tempts one to commit a sin. The Beinoni realises that committing even the “simplest” of sins separates him from God and he does not want that for even one moment!
However, attaining the level of Tzaddik is something that is given as a gift from God and though the Beinoni might want to be a Tzaddik – he must realise that it is not up to him to reach this level. It is a gift from God. Attaining a level of love of delights where one rejoices in God like the Tzaddik does, is truly a gift from God.
However, the Beinoni must still do what he must do and he must wait for God to do whatever it is that is His will. Who knows – perhaps there is still a way for the Beinoni to “become” a Tzaddik… after all…