A friend calls up to tell you that he can no longer come to see you for whatever reason and you start to think that perhaps he really doesn't want to see you. The human mind is always conjuring up disruptive thoughts. The Holy Spirit wants us to dismiss outright all thoughts that disturb our inner peace. In the case above, even if your friend tells you that he truly doesn't like you, don't dwell upon it but go right back to the Lord. Since God's love for you is ever present, only how you love him back matters. Let everything else go that disturbs your peace.