Hawzah News Agency – Imam al-Sadiq peace be upon him says:

إنَّ اللَّهَ عزّوجلّ إذا أرادَ بعَبدٍ خَيراً نَكَتَ في قَلبِهِ نُكْتَةً بَيْضاءَ، فَجالَ القَلبُ بطَلَبِ الحقِّ، ثُمَّ هُو إلى‏ أمْرِكُم أسْرَعُ مِن الطّيرِ إلى‏ وَكْرِهِ.

'Verily when Allah wants good for a servant, He marks his heart with a white spot so that his heart is occupied with seeking the truth, then He is faster at fulfilling your needs than a bird flying to its nest.'

Source: Bihar al-Anwar, v. 78, p. 292, no. 2