'Self sufficient' in the Bible

And God is able to make all grace [every favor and earthly blessing] come in abundance to you, so that you may always [under all circumstances, regardless of the need] have complete sufficiency in everything [being completely self-sufficient in Him], and have an abundance for every good work and act of charity.

I can do all things [which He has called me to do] through Him who strengthens and empowers me [to fulfill His purpose—I am self-sufficient in Christ’s sufficiency; I am ready for anything and equal to anything through Him who infuses me with inner strength and confident peace.]