The phrase "a source of limitless" is correct and usable in written English.
It can be used to describe something that provides an endless supply or abundance of a particular quality or resource.
Example: "The ocean is a source of limitless inspiration for artists and writers alike."
Alternatives: "an endless source of" or "a boundless supply of".
Dan was a source of limitless wisdom for each of us, for family and friends, far and wide across the globe.
"He and his coterie of followers at Los Alamos believed his approach could provide a source of limitless, clean energy for humanity".
His work was deeply marked by his passion for Greek and Roman antiquity, and its mythology, which for him was a source of limitless inspiration".
Joint European torus (JET) is the world's largest nuclear fusion research facility investigating the use of nuclear fusion, the process that powers the stars, as a source of clean, limitless electrical energy.
For decades, the prevailing practice among elites on both the left and the right has been to interpret the Constitution as a source of virtually limitless government power and not, as its creators intended, a charter of liberty.
When Lawrence postulated the existence of a new and hitherto unknown particle that he claimed was a possible source of limitless energy at the Solvay Conference in 1933, Chadwick responded that the results were more likely attributable to contamination of the equipment.
Attempts to harness the power of nuclear fusion, a potential source of limitless clean energy, have so far required vast, multibillion dollar test reactors.
Her professional future was limitless, her personal life a source of pleasure and vitality.
Her curiosity and commitment to iterating solutions allows her to build a limitless set of options, which is a source of her strength.
Bjorn Jones, a librarian in Salinas, Calif., an hour south of Silicon Valley, said that while the Web offered access to a seemingly limitless array of educational resources, it was also a source of mindless entertainment.
Six Sources of Limitless Energy?
