" In 1916, he wrote his first essay: "La Vie Cosmique" ("Cosmic life"), where his scientific and philosophical thought was revealed just as his mystical life.
Именно во время войны (1916 год) он написал своё первое эссе «La vie cosmique» («Космическая жизнь») — философские и научные размышления о мистике и духовной жизни.