The number of those endowed with human life is as small as the amount of earth one can place on a fingernail. Life as a human being is hard to sustain--as hard as it is for the dew to remain on the grass. But it is better to live a single day with honor than to live to 120 and die in disgrace.
Believe nothing, O monks, just because you have been told it, or it is commonly believed, or because it is traditional or because you yourselves have imagined it. Do not believe what your teacher tells you merely out of respect for the teacher. But whatsoever, after due examination and analysis, you find to be conducive to the good, the benefit, the welfare of all beings - that doctrine believe and cling to and take as your guide.
How does one stay mindful? Where feelings are known as they arise, known as they persist, known as they pass away. Thoughts are known as they arise, known as they persist, known as they pass away. Perceptions are known they arise, known as they persist, known as they pass away. This is how a monk stays awake.
Like a mother who protects her child, her only child, with her own life, one should cultivate a heart of unlimited love and compassion towards all living beings.