The Greek arkeo (ἀρκέω) means 'to be sufficient,' 'to be enough,' 'to satisfy,' or 'to be content.' It appears in John 6:7 (Philip: 'eight months' wages would not be enough'), John 14:8 (Philip: 'Lord, show us the Father and that will be enough for us'), 2 Corinthians 12:9 ('My grace is sufficient for you'), and 1 Timothy 6:8 ('godliness with contentment is great gain').
The word arkeo reaches its theological summit in 2 Corinthians 12:9: 'My grace is sufficient (arkei) for you, for my power is made perfect in weakness.' This is God's direct answer to Paul's three-fold prayer for the removal of his thorn. The divine 'enough' — arkei — redefines human sufficiency. We are not sufficient in ourselves; God's grace is the supply that makes us adequate. Philip's request in John 14:8 — 'Show us the Father and that will be enough (arkei)' — receives the most extraordinary answer: 'Whoever has seen me has seen the Father.' The fullness of God is displayed in Jesus. Arkeo teaches that all our 'enough' comes from the inexhaustible supply of divine grace.