This section is from the "May I Answer That?" book, by Sri Swami Sivananda. Also available from Amazon: May I Answer That?
The true greatness of man is to be measured not by the amount of wealth nor by the number of bungalows which are had or by the exercise of personal influence, but by the degree of selflessness, all-embracive outlook, generosity, liberal views, cosmic benefaction, self-sacrifice, egoless, self-effacing nature, grade of perception of unity in diversity, humanitarian services, etc. A truly great man is pious, spiritually elevated, magnanimous and noble-hearted. He can never have a thought for himself and he ever prefers the welfare of humanity casting aside all petty, selfish and personal interests. He ever prays for the welfare of humanity. Where there is an open, unconstricted, expansive and large heart, there lies true greatness.
A righteous man is he who is pure in thought, word and deed and who observes Yama and Niyama to the very letter. He ever moves astray for the sake of paltry gains and selfish ends. He is ever pious, God-fearing, Self-centered and selfless. He has cosmic vision and a broad outlook. He is equanimous and tolerant towards all. He is a mine of all virtues like charity, nobility, sincerity, humility, renunciation, serenity, simplicity and so on. No egoism, no lust, no greed, no crooked-mindedness, no vanity can find a place in him. The righteous man is ever the object of adoration of all. There will be no enemies to him at all, for he loves all friends and foes equally.
The Yogic method excels all other methods. It is the best and the cheapest of all prevalent systems of treatment. Take to intense Pranayam and Asans. Both these help a lot in preserving Veerya (semen) and converting the vital energy into Ojas. Practice Sirshasan, Sarvangasan, Matsyasan, Halasan, Paschimottanasan, Padahastasan and Yoga Mudra coupled with Bhastrik Pranayam. Practice Pranayam till the stage of Kevala Kumbhak is reached. When there is no necessity either to breathe in or to breathe out, Veerya becomes steady; that is, there will be no discharge or emission in any form. The Ayurvedic preparation "Chyavanaprash" is a wonderful one in enabling the regular user to preserve youth for a very long time.
"If a thing is refused to him (the Sadhak), he should not aspire for it again."
Read this statement again and again till it suffuses your entire being, till the proper substance of it is totally realized by yourself. Then only you will appreciate the grand truth to imbibe its true spirit. "Neither ask nor reject" should be the motto of an ideal Sadhak. He should not have any special craving for any particular object, however dearest and cherished it be. Whatever comes by chance without any self-effort can be had, provided that it does not degrade the individual from the moral standards. He should not develop any attachment to any object lest he should suffer mentally when the object is weaned away from him or refused to him by the will of the Lord. Everything comes and goes as per His sweet will. Whether one strives for an object or not when something is due, it certainly befalls to one's lot of its own accord. Aspirants should cultivate mental detachment and indifference towards good and evil, happiness and misery, love and hatred and all sorts of pairs of opposites. Such mental equanimity can be acquired by Atma-Vichara (self-enquiry), study of sacred scriptures, Satsang with Mahatmas, etc. Self-sacrifice, self-contentment and self-denial are what are required in the spiritual field for progress. It is no defeatist mentality if the Sadhak rests satisfied with his ordained lot without yielding himself even mentally to the temptations which he previously used to enjoy. He is certainly not the "fox that remarked that the grapes were sour when he could not reach to have them". By voluntary self-denial and dispassion or by keeping equanimity when something pleasing does not fall to one's share, tremendous will-power accumulates. It is therefore a necessity to keep balance of mind in all states of working consciousness.
 
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