This rather arbitrary constant of integration which Einstein introduced admitting it was not justified by our actual knowledge of gravitation was later said by him to be the greatest blunder of my life. However de Sitter wrote in 1919 that the term
Na ito sa halip arbitrary pare-pareho ng integration na kung saan Einstein nagpasimula ng admitting ito ay hindi na justified sa pamamagitan ng aming mga aktwal na kaalaman ng grabitasyon ay mamaya sa pamamagitan ng sinabi sa kanya upang maging pinakamalaking magkamali ng aking buhay. Subalit de pasahero wrote sa 1919 na ang mga kataga