“Whatever people do in the market economy, is the execution of their own plans. In this sense every human action means planning. What those calling themselves planners advocate is not the substitution of planned action for letting things go. It is the substitution of the planner's own plan for the plans of his fellow-men. The planner is a potential dictator who wants to deprive all other people of the power to plan and act according to their own plans. He aims at one thing only: the exclusive absolute pre-eminence of his own plan.”

οἷ γ᾽ αὐτῷ κακὰ τεύχει ἀνὴρ ἄλλῳ κακὰ τεύχων
ἡ δὲ κακὴ βουλὴ τῷ βουλεύσαντι κακίστη.
The man who does evil to another does evil to himself, and the evil counsel is most evil for him who counsels it.
He for himself weaves woe who weaves for others woe,
and evil counsel recoils on the counsellor. https://archive.org/stream/b24865898#page/432/mode/2up
Source: Works and Days (c. 700 BC), lines 265-266

Source: The Income Tax: Root of All Evil (1954), p. 54

Socialism (1922), Epilogue (1947)
Context: In fact, however, the supporters of the welfare state are utterly anti-social and intolerant zealots. For their ideology tacitly implies that the government will exactly execute what they themselves deem right and beneficial. They entirely disregard the possibility that there could arise disagreement with regard to the question of what is right and expedient and what is not. They advocate enlightened despotism, but they are convinced that the enlightened despot will in every detail comply with their own opinion concerning the measures to be adopted. They favour planning, but what they have in mind is exclusively their own plan, not those of other people. They want to exterminate all opponents, that is, all those who disagree with them. They are utterly intolerant and are not prepared to allow any discussion. Every advocate of the welfare state and of planning is a potential dictator. What he plans is to deprive all other men of all their rights, and to establish his own and his friends' unrestricted omnipotence. He refuses to convince his fellow-citizens. He prefers to "liquidate" them. He scorns the "bourgeois" society that worships law and legal procedure. He himself worships violence and bloodshed.

Celebetty: Heath Ledger: The Patriot Interview http://www.beatboxbetty.com/celebetty/heathledger/heathledger.htm, about his role in The Patriot, published at BeatBoxBetty.com (2000).
Variant: I'm not good at future planning. I don't plan at all. I don't know what I'm doing tomorrow. I don't have a day planner and I don't have a diary. I completely live in the now, not in the past, not in the future.

Herbert N. Casson cited in: Forbes magazine (1950) The Forbes scrapbook of Thoughts on the business of life. p. 218
1950s and later

§ I
1910s, At the Feet of the Master (1911)
Context: In all the world there are only two kinds of people — those who know, and those who do not know; and this knowledge is the thing which matters. What religion a man holds, to what race he belongs — these things are not important; the really important thing is this knowledge — the knowledge of God's plan for men. For God has a plan, and that plan is evolution. When once a man has seen that and really knows it, he cannot help working for it and making himself one with it, because it is so glorious, so beautiful. So, because he knows, he is on God's side, standing for good and resisting evil, working for evolution and not for selfishness.
If he is on God's side he is one of us, and it does not matter in the least whether he calls himself a Hindu or a Buddhist, a Christian or a Muhammadan, whether he is an Indian or an Englishman, a Chinaman or a Russian. Those who are on His side know why they are here and what they should do, and they are trying to do it; all the others do not yet know what they should do, and so they often act foolishly, and try to invent ways for themselves which they think will be pleasant for themselves, not understanding that all are one, and that therefore only what the One wills can ever be really pleasant for any one. They are following the unreal instead of the real. Until they learn to distinguish between these two, they have not ranged themselves on God's side, and so this discrimination is the first step.
But even when the choice is made, you must still remember that of the real and the unreal there are many varieties; and discrimination must still be made between the right and the wrong, the important and the unimportant, the useful and the useless, the true and the false, the selfish and the unselfish.

Robin Hahnel, The ABC's of Political Economy, (2002) London: Pluto Press. p. 262.