Know the Lord

‘No longer will a man teach his neighbour or a man his brother saying ‘ know the Lord’, because they will all know me.’ Hebrews 8:11

I always find it difficult telling others about my God. I either say too much or too little. I know I need to rely more on God about this.
When I look at this verse I not sure about my theology, but my thinking is it will be about a time when everyone knows and acknowledges God. This means that I won’t have the difficult job a evangelising.