# For the time will come when

"Because at some time in the future"

# people

The context indicates that these will be people who are a part of the community of believers.

# will not endure sound teaching

"will no longer want to listen to true teaching" or "will not want to listen to reliable teaching"

# they will heap up for themselves teachers according to their own desires

"they will listen to many teachers who assure them that there is nothing wrong with their sinful desires" 

# who say what their itching ears want to hear

"who say only what they want so much to hear"