There is effort involved in obtaining salvation. The effort is not for the purpose of earning salvation. That is a free gift (Romans 5:15); but we do have to fight the good fight of faith (1 Timothy 6:12). Faith in Jesus' goodness is what saves us - not our own goodness - and Satan is constantly trying to destroy our faith. We have to earnestly contend for the faith. True salvation is not just mental assent, but a real heart-felt commitment.
Many people today think that going to church and associating with Christians will provide them with salvation. Some people think that they are Christians because their parents were. But salvation is having a personal relationship with the Lord. You cannot inherit salvation through the natural birth process. "You must be born again."
We can rest assured that all those who hunger and thirst after righteousness shall be filled (Matthew 5:6). "Whosoever shall call upon the name of the Lord shall be saved."