"In professional circles the following were the most highly regarded: Beck, Halder, Manstein, Heinrich Stulpnagel, Fritzsche, and Brauchitsch. Also Rundstedt, although he was not as active in the War Ministry. General Beck was undoubtedly the greatest spirit in the general staff. However, he was always of the opinion that war would be a catastrophe and in this opinion he found a great friend in General Gamelin. In the general staff we always said that General Halder and General Manstein had received ‘the necessary two drops of the wisdom of Solomon’. In the top level of the general staff, Manstein was regarded as the ablest and most original planner. That is also my opinion. However, there was no Schlieffen."
January 1, 1970
https://en.wikiquote.org/wiki/Adolf_Heusinger