Jesus refers to “this age or this generation” many times. We are in a moment in time – an age- that will ultimately pass and give way to a new age or generation.
The children of this age marry and remarry but those who are deemed worthy to attain to the coming age and to the resurrection of the dead neither marry nor are given in marriage.
They can no longer die, for they are like angels; and they are the children of God because they are the ones who will rise. Luke 20: 34-36
God is timeless. God is the source and creator. Jesus words speak to our physical form which dies and gives birth in a cycle, like the trees of the forest.
The life after this age isn’t really, after, it is now. It must be now, there is no next age since there is no beginning or end. It all exists NOW.
“Age” is perhaps better described as realm. There is another realm that our physical senses cannot directly perceive. You feel it in your heart at times of inspiration or love. Jesus came into this realm to find us and show us the way. The prophets and wise elders of our age have spoken to us, have taught us Wisdom and given us instruction so that we may be enlightened, but Jesus, living and reigning in the eternal realm came to us to bring us home.