Be careful of people that will come to you, and pretend to be Christians or attending the church because are brought by their parents.. but be always aware that your eyes must be fixed in Christ not on men. There will be many that will try to seduce you away from your faith, it is easy if you are not with your guard up. Be careful of those that with kind words and will entice you to sin.
Remember the whirpool in the ocean, many great ships get sucked in it and never seen again. It never starts very quickly, it is always slow, a siple gentle turn, but little by little, they are pulled closer to the centre and sucked in with no mercy. Stay as far as you can from any of this whirpools of seducing companies so that you may not be pulled by their sin.
Persecutors in the church, ofen will make your faith stronger, because it will force you on your knees to pray to your God... but the seductors, will come very softly, using nice words, and language that you are used to, they will be wolves dressed in sheep skin, so they will try to trick you into thinking that they belong to Christ. Be aware, do not sleep or slumber about your faith, but always keep watch. Be alert and always in prayer. If you pray often, your life will show and with God's grace, you will be able to discern between the wolf and the sheep.