1 Nothing is difficult to the man who will try. 

2 All things are difficult before they are easy. Thomas Fuller 

3 Nothing is difficult to a man who wills. 

4 The most difficult thing in life is to know yourself. 

5 Nothing is impossible (or difficult) to the man who will try. 

6 Education makes a people easy to lead,(www.Sentencedict.com) but difficult to drive ; easy to govern but imposible to slave. 

7 The three things most difficult are, to keep a secret, to forget an injury, and to make good use of labour. 

8 To acquire wealth is difficult, to preserve it more difficult, but to spend it wisely most difficult of all. 

9 He was finding it increasingly difficult to make decisions.

10 These jokes would be far too difficult to translate.

11 She's being downright difficult and obstructive.

12 It is difficult to verbalize his lifetime of frustrations.

13 He is difficult to deal with.

14 This meat is difficult to chew.

15 You have clarified this difficult sentence.

16 The surrounding mountains make the city difficult to evacuate.

17 He showed tact in dealing with difficult customers.

18 The government is wrestling with difficult economic problems.

19 He simply sailed through the difficult exam.

20 It would be difficult for us to accept .

21 Difficult the first time, easy the second.

22 He is a very difficult character. He manipulates people.

23 Birth rates are notoriously difficult to predict.

24 That puts me in a difficult position.

25 Singularity is almost invariably a clue. The more featureless and commonplace a crime is, the more difficult is it to bring it home. 

26 Poverty is an abnormality to rich people. It is very difficult to make out why people who want dinner do not ring the bell. 

27 It is easy to learn something about everything, but difficult to learn everything about anything. 

28 If rich, it is easy enough to conceal our wealth, but, if poor, it is not so easy to conceal our poverty. We shall find it less difficult to hide a thousand guineas, than one hole in our coat. 

29 Only those who have the patience to do simple things perfectly ever acquire the skill to do difficult things easily. 

30 The more you fight something, the more anxious you become ---the more you're involved in a bad pattern, the more difficult it is to escape.