All water is not potable; the stagnant pool is to be avoided, the flowing river is better. Select and drink. Use the mosquito curtain, but, see that the mosquitoes do not get in when you go to bed. Keep them out; do not imprison them inside the net. Sail in the boat that floats on water but, do not allow the water to enter the boat. Be in worldly life, but, do not allow it to get into you. Use the doors intelligently, to let in those whom you want, and keep out those whom you do not need. The lotus, born in slime and mud, rises up through the water and lifts its head high above the waters; it refuses to get wet though water is the element which gives it life! Be like the lotus. (SSS Vol.4)