# We do not want you to be uninformed

"We want you to be informed" or "We want you to know"

# those who sleep

"those who have died" 

# so that you do not grieve like the rest

"because we do not want you to mourn like the rest"

# like the rest, who do not have hope

Here "hope "means a certainty about the future. What those people do not have confidence about can be stated clearly. Alternate translation: "like people who do not have confidence in the future promise" or "like the people who are not sure that they will rise from the dead"