“Attend to all your duties but keep your mind fixed on God.”
As quoted in Ramakrishna and His Disciples (1965) by Christopher Isherwood, p. 265
Context: Chant the name of God and sing his glories unceasingly; and keep holy company. Now and then one should visit holy men and devotees of God. If a man lives in the world and busies himself day and night with worldly duties and responsibilities, he cannot give his mind to God. So it's important to go into solitude from time to time, and think about God. When the plant is young, it should be fenced on all sides. Unless there's a fence around it, goats and cattle may eat it up.
When you meditate, go into the solitude of a forest, or a quiet corner, and enter into the chamber of your heart. And always keep your power of discrimination awake. God alone is real, that is to say, eternal; everything else is unreal, because it will pass away. As you discriminate in this manner, let your mind give up its attachment to the fleeting objects of this world. … Attend to all your duties but keep your mind fixed on God. Wife, son, father, mother — live with all of them and serve them, as if they were your very own. But know in your heart of hearts that they are not your own.
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Ramakrishna 142
Indian mystic and religious preacher 1836–1886Related quotes

Women Saints of East and West

Source: Sayings of Sri Ramakrishna (1960), p. 283

Source: https://www.facebook.com/photo.php?fbid=346794326803029&set=pb.100044173926915.-2207520000.&type=3

Philippians 4: 6-7 (KJV)
Variant translations:
Do not be anxious over anything, but in everything by prayer and supplication along with thanksgiving, let your petitions be made known to God; and the peace of God that surpasses all understanding will guard your hearts and your mental powers by means of Christ Jesus.
Epistle to the Philippians

Talks and Dialogues Saanen 1968 : 1st Public Talk (7 July 1968) http://www.jkrishnamurti.org/krishnamurti-teachings/view-text.php?tid=4&chid=2
1960s
Context: There are the states of inattention and of attention. When you are completely giving your mind, your heart, your nerves, everything you have, to attend, then the old habits, the mechanical responses, do not enter into it, thought does not come into it at all. But we cannot maintain that all the time, so we are mostly in a state of inattention, a state in there is not an alert choiceless awareness. What takes place? There is inattention and rare attention and we are trying to bridge the one to the other. How can my inattention become attention or, can attention be complete, all the time?
“Put your trust in God, but keep your powder dry.”
Popularized by Blacker in the poem "Oliver's Advice", http://books.google.com/books?id=JmEaAQAAIAAJ&dq=%22Oliver%27s+Advice%22+Cromwell&q=%22Oliver%27s+Advice%22+Cromwell#v=snippet&q=%22Oliver's%20Advice%22%20Cromwell&f=false published under the pseudonym Fitz Stewart in The Dublin University Magazine, December 1834, p. 700; where the quote is attributed to Oliver Cromwell (hence the poem's title). The repeated line in the poem is "Put your trust in God, my boys, but keep your powder dry."
Misattributed

“Put your trust in God, but keep your powder dry.”
Attributed by William Blacker (not to be confused with Valentine Blacker), who popularized the quote with his poem "Oliver's Advice" http://books.google.com/books?id=JmEaAQAAIAAJ&dq=%22Oliver%27s+Advice%22+Cromwell&q=%22Oliver%27s+Advice%22+Cromwell#v=snippet&q=%22Oliver's%20Advice%22%20Cromwell&f=false, published under the pseudonym Fitz Stewart in The Dublin University Magazine, December 1834, p. 700; where the attribution to Cromwell appears in a footnote describing a "well-authenticated anecdote" that explains the poem's title. The repeated line in Blacker's poem is "Put your trust in God, my boys, but keep your powder dry".
Attributed
Variant: Trust in God and keep your powder dry.
Variant: Put your trust in God, but keep your powder dry.