Indeed, the woes of Software Engineering are not due to lack of tools, or proper management, but largely due to lack of sufficient technical competence. Niklaus Wirth
Generally there is Stigler's law of eponymy that says that a scientific notion is never attributed to the right person; in particular, the law is not due to Stigler. Dennis Lindley
Diplomacy in general does not resolve conflicts. Wars end not due to peace processes, but due to one side giving up. Daniel Pipes
If you are distressed by anything external, the pain is not due to the thing itself, but to your estimate of it; and this you have the power to revoke at any moment. Marcus Aurelius
If men of eminence are exposed to censure on one hand, they are as much liable to flattery on the other. If they receive reproaches which are not due to them, they likewise receive praises which they do not deserve. Joseph Addison
Modern technique, as Marx pointed out, fosters the concentration of capital, and the levels of profits is supported by a scarcity of enterprise which is not due to the real cost of risk-bearing, but to the scarcity of individuals who have anything to risk. Joan Robinson