You see a person acting strangely, and your heart is troubled for their salvation. This is good, that you desire to pray. Yet be cautious: do not let this strangeness itself become a cause for judgment. Remember, we are all called strangers and sojourners upon the earth, as David said, "I am a stranger and a sojourner." The way of the Kingdom often appears jarring to the world. Before you conclude that their soul is in peril, examine whether this strangeness might simply be the awkwardness of one learning to walk the narrow path, a path contrary to the many.
Consider Zacchaeus, that publican. To many, he must have seemed strange indeed, a chief tax collector, a man of ill repute, yet climbing a tree to see the Lord. But Christ saw his heart, declared that salvation had come to his house, and the man was transformed. Do not be quick to think that because someone’s manner is odd or their profession imperfect, they stand outside grace. The important thing is that they claim Christ. The Apostle exhorts us to hold fast our confession, that Christ is God, that the faith is right. If they do this, then join your prayers with instruction by your own example. Be, as Paul said to Timothy, an example of the believers in word, in conversation, in charity, in faith, in purity. A living law, a pattern set before them.
Above all, do not let your concern become a form of idle accusation. The Lord warned about every careless word, and it is a terrible thing to judge a brother falsely. Even if they are indeed stumbling, our task is not to tear down but to recall them gently, remembering that we too are weak. The devil ever substitutes deceit for truth, but God’s desire is for conversion and healing. He says through the prophet, "Lest at any time they should be converted, and I should heal them," meaning not that He withholds mercy, but that He longs to pour it out if only they turn. Pray, then, with this hope: that whatever is distorted or lost in them might be made whole. Pray not with a spirit of condemnation, but with the confidence that the great High Priest has passed into the heavens, and that He is able to save to the uttermost those who draw near. Let your prayer be that their strangeness, if it is a sickness, be cured by the Physician of souls; if it is mere oddity, that it be clothed in love; and if it is indeed a mark of grace, that you yourself may have eyes to see it.