Heart and soul ( সর্বান্তঃকরণে ) Try heart and soul and you will succeed.
A blessing in disguise ( বিপরীতে হিত ; প্রথমে খারাপ হিসেবে মনে হলেও পরবর্তীতে ভালো হয় ) Sam's motorcycle accident was a blessing in disguise because he got enough insurance money.
A bolt from the blue ( সম্পূর্ন অপ্রত্যাশিত ) The news of his father's death came to him as a bolt from the blue.
Come off with flying colours ( জয়লাভ করা ) Our School team came off with flying colours.
Man of letters ( পন্ডিত লোক ) Sir Ashutosh Mukherjee was a man of letters.