The Holy Prophet, peace and blessings of Allah be upon him, bestowed the title of Siddiq (the Truthful) to Hazrat Abu Bakrra. So Allah the Exalted knows best the countless excellences of Hazrat Abu Bakrra. The Holy Prophetsa also said that the superiority of Hazrat Abu Bakr, may Allah be pleased with him, is owed to a quality that exists in his heart. In truth, the sincerity demonstrated by Abu Bakr, may Allah be pleased with him, is truly matchless. The fact of the matter is that in every era, anyone who desires to develop within themselves the excellences of a Siddiq and be one from among the Truthful must struggle, insofar as is possible, to inculcate within their being the nature and disposition of Abu Bakrra and then pray for this purpose as much as possible. Until a person is covered by the shade of Abu Bakr’s nature and does not take on the hue of his disposition, they cannot attain the excellences of the Truthful.
(Malfuzat [English], Vol. 2, p. 87)