Thoughts on love, gratitude, illness and presumption

If we love Christ, all things will change in our lives.  We do not love Him in order to receive some reward such as health.  Rather we love Him out of gratitude, without thinking of anything, only of the love of God.  Nor should we pray with any ulterior motive and say to God, ‘Make such and such a person well, so that he may come close to You.’  It is not right to point out ways and means to God.  How can we presume to say to God, ‘make me well’?  What can we tell to Him who knows everything?