In the Yoga Sutras of Patanjali it says…
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Tat Pratisedhartham eka tattva bhyasah

“The practice of concentration on a single subject [or the use of one technique] is the best way to prevent the obstacles and their accompaniments.”
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Sri Swami Satchidananda translates this text and states….
“When you decide on one thing, stick to it whatever happens.  There’s no value in digging [...]