My brother is now known with the name prefix 'Brahmachari'. "Brahmacharya is a practice whereby a person's life is dedicated to the quest for a personal realization of Brahman. Alternatively, it is recognized as a life that expresses Brahman through one's actions and deeds" 

I have always found that one of the toughest things in life is to rein in your mind. A success in achieving complete self control is a success of enormous proportions. Most people, can't control their feelings such as urge for food, for the opposite sex, even for a day. Great souls such as Mahatma Gandhi, had been toying all their life with the idea of Brahmacharya. 

The reason, I believe Brahmacharya is being sought by people who want to achieve complete focus in life for extraordinary achievements and courage for the task at hand, is due to the same reason that it basically means self control; will power of exceptional proportions.

If the courage and poise the great souls possess could not meet with complete success in controlling mind and emotions, where does an ordinary human being stand? In my case, where is the scope of reining in the mind and detaching my brotherly love for the rest of my life? which probably is the one and only option to forget the whole episode and calm my mind.

Sannyasi is also seen defined as "the period of a life of a man after breaking any and all connections with the material world" - which is what he set out to achieve, I suppose. At the end, it means a total disconnection from all of us. From my position, I am unable to wish him best of luck nor let him fail in his passion because I still have that brotherly affection. Between, these two conflicts, I might wander for ever. 

I have learned the hard way that one of the most important virtues of the human kind is courage, not just courage to face a snake but the kind of courage that knows no limits. That seems to be the only way to face enormous obstacles that will surely strike either in the form of 'walking away by your sibling' by developing a mind of stone or by the detection of a 'malignant tumor'. Nothing else can save you but immense courage in the face of insurmountable troubles.

As I explained, the only thing that brother seems to have shown to demonstrate is his courage, conviction, and ultimately the will power. But the only problem is that what you set to achieve using that will power? A full time search for God, is that what you set to achieve?

I wish that he used his will power in the way Gandhiji or Mother Teresa used theirs rather than searching for an elusive God. God is within you and me, God is in your mother who primarily brought you to this place. So why go out for that search, leaving your mother to shed tears for ever?