Romans 11:22

‘Behold then the goodness and severity of God. Towards those who fell, severity; but towards you, God's goodness, if you continue in his goodness, otherwise you also will be cut off.'

So their current position should make them recognise both the goodness and severity of God. Goodness towards those who continue in His goodness by continuing faith and obedience, and severity towards those who had fallen through not believing in the Messiah. But those who do not continue to benefit from His goodness through faith will inevitably find themselves also cut off.

We too should recognise the goodness and severity of God. The problem with the church at the present day is that so many rejoice in His goodness, without recognising His severity. We need to hold the two in balance. This is not to suggest that somehow we must seek to maintain our faith by ourselves, for it is God Who maintains our faith if we are His (Joh 10:27-29; 1 Corinthians 1:8; Philippians 1:6; Jude 1:24; 1 Peter 1:7). It is rather to warn that if we do not continue to truly believe it will be a sign that our faith was not genuinely in Him, otherwise He would have maintained it.