Sri Swami Vishwananda tells us today.....

Hold tight to the Divine names, any Divine name that you feel close to – you don’t need to have ten Divine names, you just need one Divine name. If you have a guru mantra, just chant your guru mantra; if you have one Divine name, one form of the Divine that you feel close with, just concentrate on one. It will be more intensified than concentrating on ten Divine names. In the mind of man, they think that when they have ten, they will advance faster. They will not advance faster. Actually they will advance less fast, because one Divine name is like digging one hole and getting the water; ten Divine names is like digging ten holes to try to get water. You will not get it. So, if you want, just chant one name.