So, Ananda, you must be lamps unto yourselves. Rely on yourselves, and do not rely on external help. Hold firm to the truth as a lamp and a refuge, and do not look for refuge to anything besides yourselves. A brother becomes his own lamp and refuge by continually looking on his body, feelings, perceptions, moods, and ideas in such a manner that he conquers the cravings and depressions of ordinary men and is always strenuous, self-possessed, and collected in mind. Whoever among my disciples does this, either now or when I am dead, if he is anxious to learn, will reach the summit...

~ Buddha

[Digha Nikaya ii.99-100, Mahaparinibbana Suttanta