Don't be deceived regarding the knowledge of what will be after your death:

Don't be deceived regarding the knowledge of what will be after your death: what you sow here, you will reap there. After leaving here, no one can make progress. Here is the work, there the reward; here the struggle, there the crowns.
(St. Barsanuphius the Great)
Modernists say "no fear after death" but it contradicts both the Scripture and the Church teaching.