Do true believers in Christianity pay careful attention about being deceived by mankind?

I believe true believing Christians do, where Jesus teaches in Matthew 24 to take heed regarding deceivers coming in his name. Having the attitude and frame of mind to die for Jesus allows believers to hear his warnings and cries very clearly to be aware of deceivers, where hearing God the Father through his son is plain and coherent about deceivers within mankind, and living in a sinless vacuum devoid of deceit is a good ogy of what true believers in Jesus' living conditions is given to them free of charge by God, keeping them in the best condition to spread the Gospel unto all nations. Jesus also teaches that Nation will rise against Nation which is similar to deceivers coming up against deceivers, so although true believing Christians are susceptible to being deceived, it will become less so.